001/*
002 * (C) Copyright 2012-2013 Nuxeo SA (http://nuxeo.com/) and others.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *     http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 *
016 */
017package org.nuxeo.connect.tools.report.viewer;
018
019import java.io.IOException;
020import java.lang.management.ThreadInfo;
021import java.util.Iterator;
022
023import javax.management.openmbean.CompositeData;
024import javax.management.openmbean.OpenDataException;
025
026import org.jolokia.converter.Converters;
027import org.jolokia.converter.object.StringToOpenTypeConverter;
028import org.nuxeo.runtime.management.jvm.ThreadDeadlocksDetector.JVM16Printer;
029
030import com.fasterxml.jackson.databind.JsonNode;
031import com.fasterxml.jackson.databind.node.ArrayNode;
032
033import sun.management.MappedMXBeanType;
034
035/**
036 * Prints thread dumps included in the report.
037 *
038 * @since 8.4
039 */
040public class ThreadDumpPrinter {
041
042    final ArrayNode dump;
043
044    ThreadDumpPrinter(ArrayNode dump) {
045        this.dump = dump;
046    }
047
048    public Iterable<ThreadInfo> iterableOf() {
049        return new Iterable<ThreadInfo>() {
050
051            @Override
052            public Iterator<ThreadInfo> iterator() {
053                try {
054                    return iteratorOf();
055                } catch (IOException cause) {
056                    throw new AssertionError("Cannot parse thread dump", cause);
057                }
058            }
059
060        };
061    }
062
063    final StringToOpenTypeConverter converter = new Converters().getToOpenTypeConverter();
064
065    public Iterator<ThreadInfo> iteratorOf() throws IOException {
066
067        return new Iterator<ThreadInfo>() {
068
069            Iterator<JsonNode> nodes = dump.iterator();
070
071            @Override
072            public boolean hasNext() {
073                return nodes.hasNext();
074            }
075
076            @Override
077            public ThreadInfo next() {
078                try {
079                    return ThreadInfo.from(
080                            (CompositeData) converter.convertToObject(MappedMXBeanType.toOpenType(ThreadInfo.class), nodes.next().toString()));
081                } catch (OpenDataException cause) {
082                    throw new AssertionError("Cannot parse thread info attributes", cause);
083                }
084            }
085
086        };
087    }
088
089    public StringBuilder print(StringBuilder sb) {
090        JVM16Printer printer = new JVM16Printer();
091        for (ThreadInfo ti : iterableOf()) {
092            printer.print(sb, ti);
093        }
094        return sb;
095    }
096
097}